Adjustable chair.



w. c. BORGERT.

ADJUSTABLE GHAIB.

APPLIOATIOH nun mac. 21. 1912.

1,087,526. Patented Feb. 1?, 1m

3 SHEETS-SHEET 1.

WWW-$16,474?!" W. G. BORGERT.

ADJUSTABLE CHAIR.

APPLIOATIOI FILED 1:30.21, 1912.

Patented Feb. 17, 1914,

3 SHEETS-SHEET 2.

raw

M -KA W. G. BORGER'I'.

ADJUSTABLE CHAIR.

APRLIOATIOH FILED DEC. 21. 1912.

Patented Feb. 17, 1914,

3 SHEBTS-SHBET 3 .ed. Fourth, to provide in an structural details,

' following specification UNITED STATES PATENT OFFICE.

WIIJJAM c. nonenn'r, or s'ruiiei's, micnie w, ASSIGNOR r0 man/ow r.wnn'rou, or

, STUBGIS, MIGHIGAN.

ADJUSTABLE cum.

Patented Feb. 17, 1914.

. Application med Dcemb'er 21, 1912. semi lio. 788,054.

To all whom it may concern a citizen of the United States residing. atSturgis, Michigan, have invented. certain new and useful Improvements inAdjustable Chairs, of which the following is a specification.

This invention relates to adjustable chairs.

The main objects of this invention are: First, to. provide in anadjustable chair, an. improved means for adjustably supporting the back.Second, to provide in an adjustable chair an effective means foradjusting the back which maybe readily controlled by means of a pushbutton device and which is substantially noiseless in Third, to providein a chair having an adj ustable back, an improved adjusting mechanismwhich effectively supports the back against m'ovementin eitherdi-rection,'and at the same time, is easily released andadjustadjustable chair, an improved means for adjustably supporting theback, which is efiective for the purpose and at the same time quitesimple in its parts and the assembling ofthe parts, and very durable.

Further objects, and objects relating to will definitely appear from thedetailed description to follow.

I accomplish the objects of my invention by the devices and meansdescribed in the The invention is learly defined and pointed out in theclaims.

A. structure which is a preferred embodi-' ment of my invention isclearly illustrated in theacc'ompanying drawing forming a part of thisspecification, in which:

Figure I is a bottom perspective view of a structure embodyingthe-features of my invention. Fig; II is a deta l inverted plan *of thestructure shown in Fig. I.

Fig. III is a bottom view ofthe'supporting' plate 7 with the spring 27mounted thereon. Fig. IV is a detail perspective view partiallyinsection, on aline corresponding to line 4-4 of Fig. 11. Fig. V is adetail vertical section on a line corresponding to line 5-5 ofimprovements in I its operation.

provided-with series of holes Fig. II Fig: VI 9. detail view, partiallyin section, on a linev corresponding to line 66 of Fig. III, showing themounting for the spring 27.- Fig. V II IS a detail perspective viewsimilar tothat of Fig. IV. of a modified structure.

In the drawin similar reference characters refer to similarpartsthroughout the several views,- andthe sectional viewssare taken lookingin the direction of the little arrows at the ends of the section lines.

Referring to 'the drawing, the .chair frame illustrated consists of therear posts .1- and front poms 2 which are extended to form the front andrear legs of the chair. on the upper ends of the posts are arms 3. Theposts are connected by -the side frame pieces 4 and the front andrearframe pieces 5 and 6, res ec'tively. provided wit a horizontal framepiece 7 on which the mechanism for adjust-ably supporting the back ismounted.

The back 8 is pivotally mounted between the rear posts 1. a theirarrangement will be readily under'-. stood. The back is provided with adown,- wardly projecting arm 9 which projects through the slot 10' ofthe horizontal frame piece 7. The arm 9 is connected by the hnk 11 tothe sliding bar 12. The sliding bar 12 is slidably su ported in a way 13formed in the upper si e of the block-like member 14. The member 14 ismounted on the under side of the supporting plate 15 by the rivets 16.The screws 16, in the structure illustrated, assist in securing themember 14 to the plate and also insecuring' the plate to the frame piece7. Additional securing The pivots are not shown,"

The frame is also i screws 17 are provided for the plate. The

member 12 is thus slidably supported against the under side of-the plate15. The slide 12 is provided with downwardly projecting cars 18 to whichthe link 11 is pivoted. The plate 15 is provided with stop lugs 19 forlimiting the rearward movement of the member 12. Coiled springs 20 areconnected to the. ears 18 and to the rear frame piece 6 and tend toreturn the back to its forward position. The slide 12 is 21 serving asseats for the clutch ball 22. The member 14. is provided with a chamber23 for-the ball 22, the chamber opening into the way 13 for the slide12. See Fi V. The ball seats or the holes 21 are pre erably conical andthe chamber 23 is of such diameter that, while the ball drops freelyfrom the seat when the ball actuating member 24 is retracted, it iseifectively supported against lateral movement. The ballactuating member24 is supported in a slide-way 25 extending through the ball chamber 23and transversely of the way for the member 12. The actuating member 24is provided witha cam 26 on which the ball travels.

When the actuating member 24 is pushed inward or actuated, the ball israised into engaging position and supported in engag ing positionuntilthe member 24 is retracte d, when the ball drops down and releases themember 12 and permits the adjustment of the back.

The spring is mounted onthe plate 15 by engaging its laterally turnedend 29 in a hole in the plate, and with the lug 30.

The actuating member 24.- is connected by the pivot 31 to one arm of thebell crank lever 32 which is mounted on one of the frame side pieces-bymeans of the bracket 33. The lever 32 is actuated by the push rod 34connected to its other arm of the lever, the pushrod being extended upthrou b one of arms 5 of the chair. With t e. parts thus arranged,whenthe push rod is moved downwardl the actuating member 24 is withdrawnor retracted, permitting the ball to drop from its engagin position andthus releasing the back. WIien the push rod is released, the actuatingmember raises the ball and supports it in its engaging position. 7

Byproviding the slide 12 connected to the back, with ball seats, theball very effectively and securely engages the same and also readilyreleases or disengages when the actuating member for the ball isretracted.

In the modification shown in Fig. VH, the ball actuating member 35 isactuated by the coiled spring 36, one end of which is connested by thescrew eye 37 to the ball holder member 14. The cam 38 of this member 35is formed by a bend or ofi'set in the bar. The operation of modificationis the same as that of the structure shown in the other figures.

The operation of the device embodying my improvements is very simple andis, as stated, substantially noiseless. At the same time, the mechanismis very secure. The parts are simple in structure and easily assembledand easily mounted on the chair.

I have illustrated and described my improvements in detail a form whichI have found satisfactory. I am aware that there are variousmodifications ossible other than the one I have illustrated, but I havenot attempted to illustrate or describe such modifications herein as Ibelieve the disclosure made will enable those skilled in the art toapply my improvements as conditions may require. derstood as claiming myimprovements specifically in the form illustrated as well as broadlywithin the scope of the appended claims.

Having thus described my 'invention,what I claim is new and desire osecure byhtters Patent is:

1. In a chair, the combination 'v'viththe frame and adjustable back, of.nected to said back, a slide'witha can of bar a supportin plate chairframe, a bail holder i p on the underside of said plate and having a wayfor sai slide chamber opening into said'way and a way disposedtransversely of said sneeway? an opening into saidball'rw a cam thereonarranged in' 'sa id cam wny'to raise and support said ball in am I i1 1position, said ball being adapted to out'of engagementiwit into saidchamber said slide when'the camis retracted, a spring arranged to onsaid ball actuating member to normally retain the same in its actu'ate'd position, abellcrank lever to which said ball actuating member isivotally connected, a supporting bracket or said lever, and a push rodconnected to said lever.

2. In a chair, the combination with the adjustable back, of a horizontalslide having ball seats therein, connected to said back, a clutch ballcoacting with said slide, a ball holder member provided with a ballchamber below said slide,- and a movable cam member disposed beneath theclutch ball adapted to raise and support said ball in its engagingposition said ball being adapted to drop into said chamber out ofengagement when the actuating member is retracted.

3. In a chair, the combination with the adjustable back, of a slide witha series of ball seats connected to said back, a clutch ball coactingwith said slide, a ball holder member provided with a ball chamber, amovable cam member adapted to support said ball in its engagingposition, and a spring arranged to act on said cam member to normallyretain the same in its actuated position.

4. In a chair, the combination with the adjustable back, of means foradjustably supporting said back, comprising a member having ball seatstherein, a clutch ball I desire, however, to be 1m aztball 1, amove ablebar-like ball actuating mber having .ball seats, a clutch'ball easecoacting with said member and a movable my hand and seal in the presenceof two cam member adapted to support said ball witnesses.

in its engaging position, a spring to retain the same in engagement, anda manually WILLIAM BORGERT' 5 operated means for withdrawing said camWitnesses:

member. J. F. WALTON, In witness whereof, I have hereunto set H. A.Knor'r.

